Restructuring (Restructuring Charges by Segment) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 32.3	$ 17.5	$ 7.2
Fluid Handling
Restructuring Cost and Reserve [Line Items]
Restructuring charges	6.1	10.5	6.1
Fluid Handling | Cost of Sales and Selling, General and Administrative
Restructuring Cost and Reserve [Line Items]
Other costs related to facility consolidations	4.4	8.7	3.9
Payment & Merchandising Technologies
Restructuring Cost and Reserve [Line Items]
Restructuring charges	19.1	7.4	2.1
Payment & Merchandising Technologies | Cost of Sales and Selling, General and Administrative
Restructuring Cost and Reserve [Line Items]
Other costs related to facility consolidations	0.7	0.2	1.6
Aerospace & Electronics
Restructuring Cost and Reserve [Line Items]
Restructuring charges	6.5	(0.4)	(1.0)
Aerospace & Electronics | Cost of Sales and Selling, General and Administrative
Restructuring Cost and Reserve [Line Items]
Other costs related to facility consolidations		2.7	2.0
Engineered Materials
Restructuring Cost and Reserve [Line Items]
Restructuring charges	0.6	0.0	0.0
Engineered Materials | Cost of Sales and Selling, General and Administrative
Restructuring Cost and Reserve [Line Items]
Other costs related to facility consolidations	$ 5.1	$ 11.6	$ 7.5